He was a college dropout sales rep at NCIX, the equivalent of any random dude working at Microcenter, who moonlighted at making low effort youtube videos. His 15+ years of "experience" are him figuring out literally everything as he went.

He's more knowledgeable than the average layman, but he's a total fucking amateur at everything he does compared to the actual experts, often including his own employees who he frequently ignores or talks over.

I think Linus is a relatively decent, somewhat funny guy, honestly. But he's not fit for his roles besides being an on camera personality.